Because you're visiting from HN and annoying HN users can be funny. See also https://jwz.org (NSFW when visited from HN)

A bit more mean-spirited then that, tildeverse appears to set a cookie as well so the redirect keeps happening.

In my experience, most browsers cache "Permanent" redirects indefinitely, which of course makes it impossible for the user to access the original URL again, or at least until they clear the cache.

They've evolved from the 90s into the 00s.